Thermally Induced Self-assembly of Gold Nanoparticles Sputter-deposited in Ionic Liquids on Highly Ordered Pyrolytic Graphite Surfaces

摘要

Gold nanoparticles sputter-deposited in ionic liquids were densely immobilized on the surface of highly ordered pyrolytic graphite (HOPG) by spreading the ionic liquid containing Au nanoparticles on HOPG and then heating. The density of immobilized Au particles was greatly dependent on the kind of ionic liquid used, and their size was controlled by the heating temperature. The resulting nanoparticle films were stable and electro-chemically active for oxygen reduction.